CN213896828U - Buffering energy-absorbing device and safety island - Google Patents

Abstract

The utility model relates to a passive safety protection technical field provides a buffering energy-absorbing device and safety island. The buffering energy-absorbing device comprises a base, a sliding block assembly, a frame assembly and an energy-absorbing element. Wherein, the base is provided with a guide rail; the sliding block component is slidably arranged on the guide rail; one end of the frame component is connected with the sliding block component, the other end of the frame component is connected with the base, and the middle part of the frame component is provided with an installation cavity; the energy absorption element is arranged in the mounting cavity to buffer the energy absorption device. The utility model provides a buffering energy-absorbing device adopts frame subassembly and energy-absorbing element to pass through slider assembly along the gliding technical means of guide rail direction, guarantees that whole buffering energy-absorbing device safe and reliable nature will the steady absorption of forward impact force, can use on canalization island, has solved the current weaker problem of canalization island protector protect function, effectively protects driver and passenger's safety.

Description

Buffering energy-absorbing device and safety island

Technical Field

The utility model relates to a passive safety protection technical field especially provides a buffering energy-absorbing device and safety island.

Background

In the field of highway traffic protection, a channelized island is a temporary stopping position of pedestrians arranged between two roundtrip lanes, so that the pedestrians cannot cross the roundtrip lanes at one time due to the fact that the width of the lanes is too wide when the pedestrians cross the roads. The channelized island has the function of protecting the safety of pedestrians in the middle of a road where vehicles cross.

The traditional canalization island is a pedestrian safety area formed by surrounding an island head formed by pouring cement and a partition column arranged at the edge of a pedestrian waiting area. Generally, a protective device such as a crash drum (containing fine sand), a crash column, or a rigid crash cover is used at the position of the island head to cushion and protect a vehicle colliding against the island head.

However, if the anti-collision barrel is used at the island head, the protection capability is weak, the buffering and energy-absorbing capability is insufficient, and the risk that the vehicle cannot be stopped by the island head of the channeling island is caused, so that the vehicle rushes into the channeling island to impact pedestrians. If the crash post or the rigid crash cover is used, the high-speed vehicle directly collides with the rigid stop, and severe impact is caused to the driver and the collided vehicle due to no buffer, so that casualties are generated.

Only 2019, Shenzhen causes 10-21-death injuries due to vehicle collision on the island head, and accidents caused by the vehicle speed of 50-70 km/h account for 53%. Therefore, the protection function of the traditional channelized island protection device is weak, and casualties are easily generated by forward collision of vehicles.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a buffering energy-absorbing device and safety island aim at solving the current weaker problem of canalization island protector protect function.

In order to achieve the above object, the utility model adopts the following technical scheme: a cushioning energy-absorbing device comprising:

the base is provided with a guide rail;

a slider assembly slidably mounted on the guide rail;

one end of the frame assembly is connected with the sliding block assembly, the other end of the frame assembly is connected with the base, and the middle of the frame assembly is provided with an installation cavity; and

an energy absorbing element mounted within the mounting cavity.

In one embodiment, the frame assembly comprises two outwardly projecting tubes, which are located on either side of the guide rail.

In one embodiment, the pipe member is a bent pipe provided with a bending strength adjusting hole.

In one embodiment, the energy absorber element comprises a first shell having an outer contour adapted to an inner contour of the mounting cavity, and a honeycomb member received in the first shell, the honeycomb member being formed with a plurality of honeycomb holes.

In one embodiment, the base is at least one of:

the base is provided with a bottom plate, and the guide rail is fixedly connected to the bottom plate;

the base is provided with a rear cover plate, the rear cover plate is connected with the frame assembly, and the rear cover plate is bent towards the direction close to the mounting cavity; and

the guide rail is an I-shaped rail.

In one embodiment, the frame assembly is detachably connected with the slider assembly; and/or the frame assembly is detachably connected with the base.

In one embodiment, the frame assembly comprises a branch pipe, the branch pipe forms a mounting groove, a first threaded hole is formed in the pipe wall of the branch pipe, a second threaded hole corresponding to the first threaded hole is formed in the top of the sliding block assembly, and the top of the sliding block assembly penetrates through the mounting groove and is connected with the mounting groove through a fastener in a threaded mode.

In one embodiment, the frame component is detachably hinged to the base, and a hinge shaft between the frame component and the base is perpendicular to a plane of the guide rail.

In one embodiment, the method further comprises at least one of the following steps:

the sliding block assembly comprises a sliding block and two supporting pieces which are respectively positioned on two sides of the sliding block, the sliding block is slidably mounted on the guide rail, the supporting pieces are in contact with the base, and the contact surface of the supporting pieces and the base is an arc surface;

the frame assembly comprises at least two support feet which are respectively positioned at two sides of the guide rail and are used for supporting on the ground; and

buffering energy-absorbing device still includes the second shell, second shell detachably covers and establishes the base slider assembly frame assembly with energy-absorbing element, the second shell has the outline to the evagination, the surface of second shell is equipped with the anticorrosive coating.

The safety island is characterized in that any one of the buffer energy absorption devices is arranged at the island head position of the safety island.

The utility model has the advantages that: the utility model provides a buffering energy-absorbing device adopts frame subassembly and energy-absorbing element to pass through the gliding technical means of slider subassembly along the guide rail direction, guarantees that whole buffering energy-absorbing device safe and reliable nature will the forward impact force steadily absorb, can use on canalization island, has solved the current weaker problem of canalization island protector protect function, effectively protects driver and passenger's safety.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is an external structural view of a buffering energy-absorbing device provided in an embodiment of the present invention;

FIG. 2 is an internal structural view of the energy absorbing and buffering device shown in FIG. 1;

FIG. 3 is a schematic structural view of a frame assembly of the energy-absorbing bumper system of FIG. 2;

FIG. 4 is a schematic illustration of the construction of an energy absorber element of the energy absorbing bumper system of FIG. 2;

FIG. 5 is a schematic structural view of a base of the energy absorption and damping device of FIG. 2;

FIG. 6 is a schematic structural view of a slider assembly of the energy-absorbing buffer device shown in FIG. 2;

FIG. 7 is a rear view of the slider assembly shown in FIG. 6.

Wherein, in the figures, the respective reference numerals:

100-base, 110-guide rail, 120-bottom plate, 130-rear cover plate, 131-second hinge, 140-pin shaft, 150-rib;

200-a slide block component, 210-a slide block, 220-a support, 230-a mounting seat, 240-a sloping plate, 250-a side plate, 260-a straight square tube, 261-a second threaded hole, 262-a fastener;

300-frame component, 310-installation cavity, 320-pipe, 321-bending strength adjusting hole, 322-first hinge, 330-branch pipe, 331-installation groove, 332-first threaded hole, 340-fastener, 350-support leg;

400-an energy-absorbing element, 410-a first shell, 420-a honeycomb, 421-a honeycomb hole, 430-a non-metallic material;

500 — second housing.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Example one

Referring to FIGS. 1 and 2, a cushioning energy absorber device includes a base 100, a slider assembly 200, a frame assembly 300, and an energy absorber element 400. The base 100 is provided with a guide rail 110. The slider assembly 200 is slidably mounted on the guide rail 110. One end of the frame assembly 300 is connected to the slider assembly 200, the other end of the frame assembly 300 is connected to the base 100, and a mounting cavity 310 is formed in the middle of the frame assembly 300. The energy absorber element 400 is mounted within the mounting cavity 310.

The utility model provides a buffering energy-absorbing device, adopt frame subassembly 300 to bear the forward impact force, and transmit this forward impact force for the energy-absorbing element 400 that is located the installation cavity 310 at its middle part, and simultaneously, with the help of sliding block assembly 200, frame subassembly 300 and energy-absorbing element 400 can remove along guide rail 110's the direction that sets up gradually, avoid energy-absorbing element 400 to appear toppling in the collision process, distortion or irregular deformation, make energy-absorbing element 400 compression deformation ability reach the biggest, reach the energy-absorbing effect the biggest, make whole buffering energy-absorbing device safe and reliable's completion energy-absorbing, can use on canalization island, the problem that current canalization island protector protect function is more weak has been solved, effectively protect driver and passenger's safety.

In addition, above-mentioned buffering energy-absorbing device adopts the modularized design, and when overall structure received impact deformation, slider component 200 and base 100 will not appear warping because of its excellent structure and intensity, can carry out used repeatedly, make the whole replacement of product convenient, need not to carry out the secondary construction. For example, after a collision is completed, only the frame assembly 300 and the energy absorbing element 400 need to be replaced, thereby reducing secondary construction of the foundation, reducing replacement construction time and cost, and facilitating maintenance and secondary replacement.

In one embodiment, in conjunction with fig. 2 and 3, the frame assembly 300 includes two outwardly projecting tubes 320. Two tubes 320 are located on either side of the rail 110. Thus, the outwardly protruding tube 320 can effectively withstand normal, partial, and multi-angle impacts, and achieve a multi-directional protection function.

Wherein the pipe member 320 itself can stably absorb a part of energy generated by the impact force by deforming. For example, when a low-speed non-motor vehicle is impacted, the pipe 320 itself can resist a large impact, so that the whole buffering energy-absorbing device is not damaged. The structure that the convex pipe 320 is matched with the energy-absorbing element 400 can effectively discriminate vehicles according to the impact force, deformation energy absorption is started only when the impact force reaches the limit value, the impact on the non-motor vehicle can be stopped, the structural damage does not occur, and the maintenance cost of the product is greatly reduced.

Alternatively, the tube 320 is a square tube, a circular tube, a trapezoidal tube, an elliptical tube, or the like. The side surface of the square tube is a plane, so that the stress area is large, and the impact resistance of the buffering energy absorption device is favorably improved.

Specifically, the pipe member 320 is a bent pipe provided with a bending strength adjusting hole 321. The bending strength of the bending pipe having the bending strength adjusting hole 321 is increased, which is advantageous to improve the impact resistance of the frame assembly 300. In addition, the manufacturer can flexibly change the size of the bending strength adjusting hole 321 according to the protection requirement of the customer, thereby changing the bending strength of the bending pipe.

Correspondingly, the mounting cavity 310 formed by the arc-shaped bent pipe is used for mounting the arc-shaped energy absorption element 400, the stress area of the arc-shaped energy absorption element 400 is changed in a gradient manner in the compression process, the force of the energy absorption element 400 resisting compression deformation is gradually increased along with the increase of the compression amount, and is gradually decreased after the maximum stress area is reached, so that the acceleration of the vehicle types with different weights and speeds after being impacted can be kept in a safe range.

It is understood that the outwardly convex pipe 320 may be a curved pipe or a plurality of non-parallel straight pipes connected in sequence.

In one embodiment, and with reference to figures 2 and 4, the energy absorber element 400 includes a first shell 410 and a honeycomb 420, the outer profile of the first shell 410 conforming to the inner profile of the mounting cavity 310 such that the impact forces experienced by the frame assembly 300 are effectively transferred to the energy absorber element 400. The honeycomb member 420 is accommodated in the first casing 410, and the honeycomb member 420 is formed with a plurality of honeycomb holes 421.

The cross-sectional profile of the honeycomb holes 421 is regular hexagon, so that all directions of impacts on the honeycomb member 420 can cooperatively deform, force values and deformation tend to be consistent when all directions of impacts are transmitted from the frame assembly 300, and deformation of the whole is facilitated.

Specifically, referring to FIG. 4, one particular construction of the energy absorber element 400 is where the honeycomb 420 is made of a metallic material, which can be selected from aluminum sheet, galvanized steel sheet, and the like. At least one of the honeycomb holes 421 is filled with the non-metal material 430, or at least one of the gaps between the honeycomb 420 and the first housing 410 is filled with the non-metal material 430. The non-metallic material 430 may be selected from a polyethylene foam or a polyurethane. The honeycomb member 420 made of metal can prevent the whole body from being deformed due to the expansion of the non-metal material 430 when the honeycomb holes 421 are filled with the non-metal material, and effectively ensures the consistency and convenience of filling. Due to the stable compression resistance and the excellent compression rate of the non-metal material 430, the non-metal material is combined with the honeycomb piece 420 made of metal, so that the energy absorption advantage of the non-metal material is fully exerted, and the product quality and the cost are effectively reduced under the requirements of the same strength and energy absorption capacity.

The energy absorbing effect of the energy absorbing element 400 is different according to different filling positions and different filling numbers of the non-metallic material 430, and the energy absorbing capability of the energy absorbing element 400 can be flexibly adjusted according to specific application scenes.

Specifically, another specific configuration of the energy absorber element 400 is to provide the sidewalls of at least one of the honeycomb holes 421 with a plurality of ribs to increase the strength of the energy absorber element 400.

In the two specific structures of the energy absorbing element 400, the manufacturer adjusts the strength and the energy absorbing reliability of the energy absorbing device by adjusting the material and the thickness of the honeycomb piece 420 and the density of the filled non-metal material, so that different protection requirements are met, and the product universality is improved.

In one embodiment, referring to fig. 2 and 5, the base 100 is provided with a bottom plate 120, and the guide rail 110 is fixedly connected to the bottom plate 120. Specifically, the guide rail 110 may be welded to the base plate 120, or the guide rail 110 and the base plate 120 may be integrally formed. The guide rail 110 is fixedly connected to the base plate 120, so that the integrity of the base 100 is improved, and the overall connection strength of the base 100 is enhanced.

In addition, during an actual collision, the frame assembly 300 and the energy absorbing assembly are used to withstand impact forces and absorb energy, and may be damaged and need to be replaced; however, the base 100 is difficult to damage and does not need to be replaced, so that the base 100 is fixedly arranged, and the guide rail 110 is fixed on the bottom plate 120, which is beneficial to reducing the later maintenance cost.

In one embodiment, referring to fig. 2 and 5, the base 100 is provided with a rear plate 130, the rear plate 130 is connected to the frame assembly 300, and the rear plate 130 is bent toward a direction adjacent to the mounting cavity 310. The backplate 130 is a curved structure that provides a reaction force to support the energy absorber element 400 for deformation and energy absorption.

Optionally, the backplate 130 is provided with a number of vertical ribs 150.

In one embodiment, in conjunction with fig. 2 and 5, the guide rail 110 is a i-rail. The I-shaped rail has high bending strength, the sliding block assembly 200 is matched and connected with the I-shaped rail, the structural integrity can still be kept when the I-shaped rail is stressed in multiple directions, the frame assembly 300 and the energy absorption element 400 at the upper end of the I-shaped rail can smoothly and completely complete energy absorption when being impacted, and the integral structure can be prevented from overturning when being impacted.

In one embodiment, in conjunction with fig. 2, 3 and 6, the frame assembly 300 is removably coupled to the slider assembly 200; and/or the frame assembly 300 may be removably coupled to the base 100. In the actual collision protection process, the frame assembly 300 and the energy absorbing element 400 located in the frame assembly 300 bear impact force and may be damaged and need to be replaced, and the frame assembly 300 is detachably connected, so that the assembly is convenient and the subsequent replacement and maintenance are convenient.

In one embodiment, referring to fig. 2, 6 and 7, the frame assembly 300 includes a branch pipe 330, the branch pipe 330 forms a mounting groove 331, a first threaded hole 332 is opened on a pipe wall of the branch pipe 330, a second threaded hole 261 corresponding to the first threaded hole 332 is opened on a top of the slider assembly 200, and the top of the slider assembly 200 is inserted into the mounting groove 331 and is threadedly connected through a fastener 262. Thus, the slider assembly 200 does not directly bear the impact force, effectively endures the impact when impacted, and does not deform itself, so that the jamming caused by the deformation is eliminated when the slider assembly 200 and the guide rail 110 slide relatively. And, the slider assembly 200 is in threaded connection with the frame assembly 300, so that the slider assembly 200 and the frame assembly 300 can be reliably connected under the impact action.

Specifically, the left and right sides of the branch pipe 330 are respectively connected with a pipe 320 in an arc shape, and the front and rear sides of the branch pipe 330 are opened with the first threaded holes 332.

In one embodiment, with reference to fig. 2 and 3, the frame assembly 300 is detachably hinged to the base 100, so that the structure is simple, the modular disassembly is convenient, and the subsequent maintenance of the frame assembly 300 is convenient. The hinge axis between the frame assembly 300 and the base 100 is perpendicular to the plane of the guide rail 110. When the frame assembly 300 is deformed, the end connected to the base 100 rotates around the rotation shaft, so as to effectively transfer the impact force backward and reduce the positive impact force applied to the base 100.

Specifically, the frame assembly 300 is provided with a first hinge 322 at an end thereof away from the slider assembly 200, the base 100 is provided with a second hinge 131, and the pin 140 is inserted in the first hinge 322 and the second hinge 131.

In one embodiment, referring to fig. 2 and 6, the slider assembly 200 includes a slider 210 and two supporting members 220 respectively located at two sides of the slider 210, the slider 210 is slidably mounted on the guide rail 110, the supporting members 220 contact the base 100, and the contact surface of the supporting members 220 and the base 100 is a circular arc surface. The supporting member 220 supports the slider assembly 200 and the upper frame assembly 300, and the contact surface is a circular arc surface, so that the friction between the supporting member 220 and the base 100 when sliding along with the slider 210 can be effectively reduced, and the overall sliding resistance can be reduced.

Optionally, the support 220 is a round bar or a roller. Wherein, the central line of the round bar is consistent with the arrangement direction of the guide rail 110. The center line of the roller is perpendicular to the arrangement direction of the guide rail 110.

Specifically, referring to fig. 6, the slider assembly 200 further includes a mounting seat 230, an inclined plate 240, a side plate 250 and a straight tube 260, the slider 210 and the support 220 are fixed at the bottom of the mounting seat 230, the inclined plate 240 and the side plate 250 are fixed at the top of the mounting seat 230, the straight tube 260 is fixed at the top of the inclined plate 240 and the side plate 250, and the straight tube 260 is configured to be inserted into the mounting groove 331 of the frame assembly 300.

In one embodiment, referring to fig. 2, the frame assembly 300 includes at least two feet 350, the at least two feet 350 are located on two sides of the rail 110, and the feet 350 are used for supporting on the ground. When oblique collision or oblique collision occurs, the support legs 350 protect the lateral stability of the overall structure and avoid insufficient energy absorption caused by instability.

In one embodiment, in conjunction with FIG. 3, the frame assembly 300 includes a fastener 340. A fastener 340 extends to the bottom of the mounting cavity 310, and the fastener 340 is removably snap-fit connected to the energy absorber element 400. When the frame assembly 300 is damaged under compression and the energy absorber element 400 is not damaged, the energy absorber element 400 can be separated from the frame assembly 300 and only the frame assembly 300 needs to be replaced, thereby reducing maintenance cost.

In one embodiment, and with reference to FIG. 1, the energy-absorbing bumper system further includes a second housing 500, the second housing 500 removably encasing the base 100, slider assembly 200, frame assembly 300, and energy absorber 400. The second housing 500 can play a role of waterproof and dustproof.

Specifically, the second housing 500 has an outer contour that is convex outward, so that the second housing 500 has a circular arc shape. The arc-shaped second housing 500 can effectively bear normal collision, partial collision and multi-angle collision, so that all directions are uniformly stressed.

Specifically, the surface of the second housing 500 is provided with an anticorrosive layer.

Specifically, the surface of the second housing 500 may be printed with a pattern to coordinate with the urban road environment.

Specifically, the second housing 500 is a thin metal skin.

Example two

The safety island is a place which is arranged between the two roadways for pedestrians to temporarily stay when crossing the road, and is generally divided into a canalization island and a secondary street crossing island. And a protection device is arranged in the safety island area, so that the safety of pedestrians in the island can be protected.

The utility model also provides a safety island. The island head of the safety island is provided with any one of the buffering and energy absorbing devices in the embodiment. The structure of the buffering energy absorption device is suitable for safety islands of various road conditions, and has strong applicability and universality.

In addition, with the same construction, a specific protective design can be made for a particular vehicle by varying the size, material, or honeycomb 420 material, thickness, and filler density in the energy absorber element 400 of the frame assembly 300.

Specifically, the buffering energy absorption device is arranged at the sharp corner position of the channelized island, is opposite to the driving direction of the vehicle, is positioned in a safe white line at the periphery of the island head, is positioned in a safe area when the vehicle turns and runs linearly, does not occupy a lane, and does not influence the normal driving of the vehicle.

It is understood that in other embodiments, the energy absorption and buffering device can also be mounted on vehicles, buildings, aircrafts and other objects to achieve the function of collision protection.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The utility model provides a buffering energy-absorbing device which characterized in that: the method comprises the following steps:

the base is provided with a guide rail;

a slider assembly slidably mounted on the guide rail;

one end of the frame assembly is connected with the sliding block assembly, the other end of the frame assembly is connected with the base, and the middle of the frame assembly is provided with an installation cavity; and

an energy absorbing element mounted within the mounting cavity.

2. The device of claim 1, wherein: the frame assembly comprises two outwardly convex pipe fittings, two of which are located on both sides of the guide rail.

3. The device of claim 2, wherein: the pipe fitting is a bent pipe, and the bent pipe is provided with a bending strength adjusting hole.

4. The device of claim 1, wherein: the energy absorption element comprises a first shell and a honeycomb piece, the outer contour of the first shell is matched with the inner contour of the mounting cavity, the honeycomb piece is accommodated in the first shell, and a plurality of honeycomb holes are formed in the honeycomb piece.

5. The device of claim 1, wherein: the base is at least one of:

the base is provided with a bottom plate, and the guide rail is fixedly connected to the bottom plate;

the base is provided with a rear cover plate, the rear cover plate is connected with the frame assembly, and the rear cover plate is bent towards the direction close to the mounting cavity; and

the guide rail is an I-shaped rail.

6. The device of claim 1, wherein: the frame assembly is detachably connected with the sliding block assembly; and/or the frame assembly is detachably connected with the base.

7. The device of claim 6, wherein: the frame subassembly includes the branch pipe, the branch pipe is formed with the mounting groove, first screw hole has been seted up to the pipe wall of branch pipe, slider assembly's top be equipped with the second screw hole that first screw hole corresponds, slider assembly's top is worn to locate just through fastener threaded connection in the mounting groove.

8. The device of claim 6, wherein: the frame component is detachably hinged with the base, and a hinge shaft between the frame component and the base is perpendicular to the plane of the guide rail.

9. The device according to any one of claims 1 to 8, characterized in that: further comprising at least one of:

the sliding block assembly comprises a sliding block and two supporting pieces which are respectively positioned on two sides of the sliding block, the sliding block is slidably mounted on the guide rail, the supporting pieces are in contact with the base, and the contact surface of the supporting pieces and the base is an arc surface;

the frame assembly comprises at least two support feet which are respectively positioned at two sides of the guide rail and are used for supporting on the ground; and

buffering energy-absorbing device still includes the second shell, second shell detachably covers and establishes the base slider assembly frame assembly with energy-absorbing element, the second shell has the outline to the evagination, the surface of second shell is equipped with the anticorrosive coating.

10. A security island characterized by: the island head position of the safety island is provided with the buffering and energy absorbing device according to any one of claims 1 to 9.

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